Revenue from downloads is still led by Apple, whose App Store boasts 2.3 times the revenue of Google Play. But that figure is fast sinking, as last quarter the researcher reported that Apple’s App Store did 2.6 times that of the revenue at Google’s app store. Also, Google Play downloads were 90% of those at the App Store in the period.

“Downloads tend to be an indicator of where things are moving, and as you start to see downloads begin to increase, that’s where you see the revenue increase,” says App Annie spokesman Marcos Sanchez.

There’s a solid catalyst for this growth: Google said on its second-quarter earnings call that Android activations have hit 900 million worldwide.

The movement underscores Apple’s sinking advantage in a world dominated by Android software, where not only do its devices face increasing competition, but its marketplace as well.

Games are key moneymakers for the app stores of both Apple and Google. Games made up more than 80% of revenue on Google Play vs. about 75% at Apple’s App Store. Revenue from games played in Japan was a bright point for Google Play.